1. Family: Araceae Juss.
    1. Genus: Apoballis Schott
      1. Apoballis sagittifolia (Alderw.) S.Y.Wong & P.C.Boyce

        This species is accepted, and its native range is Sumatera.

    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    General Description
    Herb to c. 60 cm tall. Stem ?erect, ?pleionanthic (specimen fragmentary), c. 1.5 cm diam. Leaves few together; petiole ?30–35 cm long (see Alderwerelt, loc. cit.), minutely pubescent, sheathing in the lower 1⁄5; wings of sheath fully attached, ?degrading, tapering; blade broadly lanceolato-sagittate, 25 cm long × 6 cm wide, the base divided into two rather narrowly triangular, apically acutely rounded posterior lobes c. 4 cm long, the apex acute and acuminate for c. 3 cm; midrib somewhat prominent abaxially and adaxially, abaxially pubescent like the petiole, with c. 18 abaxially sparsely pubescent primary lateral veins on each side irregularly and infrequently (within a leaf) alternating with lesser interprimaries, diverging at c. 80–100° and acropetally deflected more or less abruptly and running into a rather conspicuous intramarginal vein c. 1.5 mm from the margin, the primary veins of the posterior lobes united into posterior costae from which they emerge at a low angle thence abruptly acropetally reflexed; secondary venation arising from the midrib and sometimes from some distance along the primary veins, adaxially obscure, faint and fine abaxially; tertiary venation obscure. Inflorescence ?solitary; peduncle c. 7.5 cm long (see Alderwerelt). Spathe c. 9 cm long; lower spathe more or less obovoid, c. 1.75 cm long; limb lanceolate, clasping the spadix (but inflorescence immature), c. 7.25 cm long, ?semi-persistent. Spadix (immature and incomplete) white; female zone oblong-ellipsoid, c. 1 cm long; ovary oblong; stigma discoid, rotund, broad; interpistillar staminodes absent from among the pistils, concentrated at the top of the female zone; sterile interstice c. 5 mm long, with scattered very short apically flattened and rotund staminodes; male zone and appendix unknown; infructescence unknown.
    Diagnostic
    The very narrowly sagittate leaf blade with numerous primary lateral veins is not matched by any other species in this group, though it approaches S. hastifolia.
    Habitat
    In low montane forest
    Distribution
    Malesia: endemic to Sumatera; known only from the type.
    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    Distribution

    Malesia: endemic to Sumatera; known only from the type.

    General Description

    Herb to c. 60 cm tall. Stem ?erect, ?pleionanthic (specimen fragmentary), c. 1.5 cm diam. Leaves few together; petiole ?30-35 cm long (see Alderwerelt, loc. cit.), minutely pubescent, sheathing in the lower 1/5; wings of sheath fully attached, ?degrading, tapering; blade broadly lanceolato-sagittate, 25 cm long × 6 cm wide, the base divided into two rather narrowly triangular, apically acutely rounded posterior lobes c. 4 cm long, the apex acute and acuminate for c. 3 cm; midrib somewhat prominent abaxially and adaxially, abaxially pubescent like the petiole, with c. 18 abaxially sparsely pubescent primary lateral veins on each side irregularly and infrequently (within a leaf) alternating with lesser interprimaries, diverging at c. 80-100° and acropetally deflected more or less abruptly and running into a rather conspicuous intramarginal vein c. 1.5 mm from the margin, the primary veins of the posterior lobes united into posterior costae from which they emerge at a low angle thence abruptly acropetally reflexed; secondary venation arising from the midrib and sometimes from some distance along the primary veins, adaxially obscure, faint and fine abaxially; tertiary venation obscure. Inflorescence ?solitary; peduncle c. 7.5 cm long (see Alderwerelt). Spathe c. 9 cm long; lower spathe more or less obovoid, c. 1.75 cm long; limb lanceolate, clasping the spadix (but inflorescence immature), c. 7.25 cm long, ?semi-persistent. Spadix (immature and incomplete) white; female zone oblong-ellipsoid, c. 1 cm long; ovary oblong; stigma discoid, rotund, broad; interpistillar staminodes absent from among the pistils, concentrated at the top of the female zone; sterile interstice c. 5 mm long, with scattered very short apically flattened and rotund staminodes; male zone and appendix unknown; infructescence unknown.

    Habitat

    In low montane forest c. 600 m alt.

    Distribution

    Native to:

    Sumatera

    Apoballis sagittifolia (Alderw.) S.Y.Wong & P.C.Boyce appears in other Kew resources:

    First published in Bot. Stud. (Taipei) 51: 254 (2010)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    Literature

    CATE Araceae
    • Hay, A. & Yuzammi 2000. Schismatoglottideae (Araceae) in Malesia: 1. Schismatoglottis. Telopea. 9 (1): 1-177

    Sources

    CATE Araceae
    Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 17 Dec 2011.
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0